Electrical Source Imaging SoftwareGeoSource 3 Research

Now with individual head models

The culmination of 25 years of interdisciplinary research, GeoSource 3 Research software leverages dense array EEG technology, high-resolution MRI imaging, sophisticated electric head modeling, and accelerated computing to create a powerful platform for electrical source imaging, with head model validation, forward EEG data modeling,

and support for advanced neuromodulation planning and other advanced research applications.

Choose individual, atlas, or conformal/warped atlas head models

Employing the Finite Difference Method (FDM) with 7 characterized tissue types for the most realistic head models

Using high-resolution, dense array EEG with up to 256 channels

Higher resolution with dense array EEG dataTo provide the best source imaging results, GeoSource 3 software makes full use of dense array EEG data, with up to 256 sensors for whole head coverage.

More realistic head models with 7 different tissue typesAutomated software characterizes tissue types — scalp, skull, cerebrospinal fluid,grey matter, white matter, air, and eyeballs — directly from 1 mm MRI data for the most realistic anatomy across the entire head.

Fast and easy step-by-step head model building

Sensor Registration for higher accuracyConformal and individual head models incorporate EEG sensor location to define the path of electrical

current from the cortex to the scalp, a critical component for the most accurate source estimation.

Use the Geodesic Photogrammetry System with sensor digitization from whole-head photographs or the GeoScan Sensor Digitization Device for real-time digitization using an optical scanner.

More realistic electrical conductivity modeling using the Finite Difference Method (FDM)The FDM performs voxel-by-voxel calculations of the electric potentials, making full use of the high-resolution geometry of the original MRI image.

• A dedicated pipeline software guides you through each step with opportunities to review the model at all stages of construction.

• The FDM software is optimized for high-performance computing and is performed using a high-performance GPU compute node (included with Intermediate and Advanced Packages) so that computing time is accelerated from days to minutes.

GeoSource 3 Research packages improve on current ESI methodology by using dense array EEG data and much more realistic head models to define the path of electrical current from the cortex to the scalp.

www.egi.com

Choose from three different packages, depending on your research needs

All packages include:

GeoSource 3 Research software is seamlessly integrated with EGI’s GTEN 100 Neuromodulation System, for defining dense array neuromodulation targets.

Import MRI scans for the most realistic brain anatomy

Build individual head models with GeoSource 3 Research ADVANCED Package

• LORETA, sLORETA, and LAURA source estimation algorithms• FDM head models built from 1 mm resolution MRI data

Includes built-in age and gender specific head models 1 infant, 2 pediatric, and 3 adult

Use digitized sensor positions to conform/warp an atlas head model to individual head geometry (requires sensor registration)

Use atlas head models included in the BASIC package

No Individual MRI data?Build conformal atlas head models with

the INTERMEDIATE package

Generate forward projections for scalp voltage data from any region of the cortex.

Explore the FDM head model

www.egi.com

To schedule a demo, or for more information, contact info@egi.com

GeoSource 3 Research Packages are covered by US Pat. No. 8,478,011. The Geodesic Photogrammetry System is covered by US Patent No. 7,190,826. GeoSource, Geodesic EEG, Geodesic Photogrammetry System, GeoScan, GES, GTEN, Geodesic Sensor Net, and

Net Station are trademarks of Electrical Geodesics, Inc.

Electrical Geodesics, Inc.500 East 4th Ave., Suite 200Eugene, Oregon 97401phone 541.687.7962fax 541.687.7963www.egi.com

GeoSource 3 Research software is for research use only. However, every GeoSource 3 Research Package also includes the clinically cleared GeoSource 2 software for laboratories or clinics requiring both options.

*Requires the Geodesic Photogrammetry System or the GeoScan Sensor Digitization Device.

Related products:

Geodesic EEG System™ (GES) 400, 405 and 410 – for dense array EEG acquisition, review, and analysis using Net Station 5 software.

Geodesic Sensor Nets – fast-application electrode nets with 32, 64, 128, or 256 channels for whole head, dense array EEG.

Geodesic Photogrammetry System™ (GPS) and GeoScan™ Sensor Digitization Device – complete hardware and software packages for digitizing the sensor positions.(GeoScan is for research use only.)

GTEN™ 100 Research Upgrade Package – for dense array neuromodulation integrated with source estimation. (For research use only.)

GeoSource 3Research

BasicPackage

IntermediatePackage

AdvancedPackage

Source Estimation Software

FDM Atlas ElectricHead Models

Software module for building conformal/warped

FDM head models using sensor position data*

Software for importing MRI DICOM data

High-performance GPU compute node for

building FDM head models

GeoSource 3 brochure, Jun 2016. MM_459